Biogeography - the study of the past and present distribution of living organisms, Comparative anatomy - the study of features of different species to look for evidence of a common ancestor, Evolution - the change in characteristics of living things over time, Homologous structures - parts of organisms that show evidence of a common ancestor, Fossil - the geologically altered remains of an organism that was once alive, Fossil record - a records of all fossils found on Earth, Palaeontologist - a scientist who studies fossils, Antibiotic - a medicine that kills bacteria or stops them reproducing, Hereditary - traits passed by parents to their offspring, Natural selection - the process where organisms that are better suited to their environment tend to survive and reproduce, passing their traits on to further generations, Pesticide - a substance that kills pests, such as insects or weeds, Adaptation - a change in the structure or function of an organism that has evolved over generations that makes it better suited to its environment, Gene - a unit of heredity passed from parents to offspring; made of DNA, Genetic variation - the difference in genes within individuals of a population,

Evolution

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